Door-locking device



May -13 1924.

A, L. IDAVENFORT ET An. DooRLocKING DEVICE Filed Aug. 7. 1922 Jimwmmm Amm Lion 'DAVENPORT APTHUJ? JOHN JAMES. BY

FICE# Patented May 13, 1924.

UNITED ,STATES PATENT v,OF

ALPHA LEON DAVENPORT AND ARTHUR `JOHN JAMES, Or VANCOUVER, BRITISH .,ooLUMBrA., CANADA.

` l noon-LOOKING nnv'ron.

Application filed August 7, 1922. Serial NO. 580,296.

zens ofthe United States, and both residing at the city of Vancouver, in the Province of BritishvColumbia, Canada, have invented certain new and useful Improvements in Door-Locking Devices, of whichA the fol#` loivingis a specification.

Our invention relates to kimprovements in door locking devices and the object of our invention is to provide a device of `this character Which is so constructed that it may be rendered inoperative to prevent the lock with which it is used being opened by any unauthorized person. yA particular-object is to devise a locking means capable of being used to great advantage with the form of lock fully described and claimed in Letters Patent of the United States No. 1356604, grantedytous on the 26th day of Uctober, 1920 and Which enables the complete lock to begreatly simplified and rendered more inexpensive.

We attain'these objects by the construction illustrated by the accompanying drawings in Whichj ig. 1 is a longitudinal sectional elevation of the lock with Which the device is used.

Fig. 2 is a detail View of the'locking spindle.

Figs. 3 and 4 are faceviews of the escutcheon plates.

Fig. 5 is a perspective View of the device assembled.

Fig. 6 is a detail view in perspective of the rollback.

Similar figures of reference indicate similar parts throughout the several views.

In order to more clearly understand the invention the lock construction shown in Fig. 1 will be briefly described; an `extended description, however, will be found in the Letters Patent above mentioned.

Referring to Fig. 1, the lock consists of a tubular cylinder 1 having on its outer end a ange 2 having holes through which screws may be passed to secure the lock to the door. The cylinder is closed at its inner end by a cap or plug 3` and slidably mounted in the bore of the cylinder is the lock bolt 4.- the outer end of which projects normally beyond the flange 2 While its inner end is recessed as at 5 and bears on the end ofa tension spring 6 disposedbetvveen the end of the bolt andthe plug 3. The bolt is guided in its travel during projection and retraction by means of ykeys or lugs 7 and 8 fitting slidably iny slots-9 `and"-10 formed in the cylinder 1, and `up to this point the construction is substantially similar to that described in the Letters` Patent above mentioned. y H f Referring now to Fig. 1 in conjunction with the remaining figures, 11 indicates a tongue the ends of Which aremountedin the slots v9 and 10, `which tongue is provided With side bosses v12 and v13 through which extends a bore 14, these bosses forming bearings resting in a recess 15 `formed in the bolt and the cylinderto support theytongue `in a substantially vertical position so that its upper and lower rear edges may respectively engage the lock bolty as the tongue is operated. The rear Wall of the bore 14 is depressed to form a substantially semi-circu lar groove 16, the bore being then crescent shape in cross section and through this bore extends the handle spindle 17 which is also crescent shaped in cross section or in other of the spindle on the outer side of the respective escutcheon plates 21 and 22.

23 indicates the locking spindle which. when assembled, lies in the groove 18 of the handle spindle and extends through the lock and both escutcheon plates into each knob. the end projecting into knob 19 being formed in any approved manner so that it may be engaged and turned by a suitable key 24 inserted into a keyhole in the knob, this being the knob on the outside of the door. The opposite end of the .spindle 23 which projects into knob 20, or the one on the inside of the door, is preferably connected by any suitable means to a small handle 25 which rests permanently on the outer end of the knob and which takes the place, on the inside of the` door. of the outside key 24, from which it will beseen that the spindle 23 may be operated from both ends, when required. The spindle, Where it passes through the groove 16 is truly circular, as at 26, so as to be as hereinafter described and freely rotatable therein, but where it passes through the bores of the respective escutcheon plate bosses 27 and 28 it is enlarged, as at 29 and 30, these enlargementsv being formed circular for the major portion or their circumference while the remaining portion is flattened, as shown at 31 in Figs. 2, 3 and 4:. Each escutcheon plate bore is provided with a groove, indicated by the numerals 32 and 33 respectively, extending through it in which the respective enlargements 29 and 30 are adapted to be seated, as shown in Figs. 3, 4, and 5.

The manner in which the device is operated may be described briefly as follows. ln placing the lock and the locking device on a door a hole is bored in the edge slightly klarger in diameter and length than the cylinder 1 and in the hole the cylinder With the .lock` bolt and tongue in place, is inserted, the handle spindle having first been Withdrawn. The .handle spindle, With the locking spindle seated in the groove 18, is then passed through the lock from side to side,.the handle spindle passing through the crescent shaped bore 14 and the locking spindle passing through the groove 16 so that its reduced circular portion 26 rests therein.

after` Which the escutcheon plates and the knobsare secured in place.

It Will now be seen that, as the locking spindle is capable of independent rotation, it may be turned to bring the circular portions of its enlargements 29 and 30 to lie in the respective grooves 32 and 33 of the escutcheon plates asshovvn in Figs. 3 and 5 so that the lockbolt cannot then be retracted and the door opened as the engagement ot' the enlargements 29 and 30 in their respective grooves 32 and 33 prevents the turning of the handle. If, however, the locking spindle be turned to bring the enlargements 29 and 30 to lie in the handle spindle groove 18, the attened portions 31 being then opposite the grooves 32 and 33 of the escutcheon plates, the handle may be turned to open the door since the spindle 17 is then capable of turning freely the amount necessary to retract the bolt. rlhus by turning the locking spindle 23 to carry its circular enlarged por` tions into or out of engagement With the escutcheon plate lgrooves the handle spindle may be respectively locked or unlocked.

From the foregoing it `Will be seen that We have devised a simple, inexpensive, and highly practical door locking device.

What We claim as our invention is 1. A door locking device comprising a handle spindle having a semi-circular groove extending longitudinally of it, escutcheon plates through which said spindle passes each having a semi-circular groove in its bore, and a rotatable annular locking .spindle seated in said handle spindle groove and extending through said escutcheon plate grooves,said spindle being flattened Where it passes through said plates.

2. A door locking device comprising a. handle spindle having a semi-circular groove extending longitudinally of it and provided on each end With operating knobs, escutcheon plates through which said spindle passes each having a semi-circular groove in its bore, a rotatable annular locking spindle seated in said handle spindle groove, and eX- tending through said escutcheon plate grooves, said spindle being flattened Where it passes through said plates, and means for operating said locking spindle independently of said handle spindle.

In testimony whereof We a'liix our signatures at Vancouver, B. C. this 27th day of July, 1922.

ALPHA LEON DAVENPORT. ARTHUR JOHN JAMES. 

